CVE-2017-5402

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 52 Firefox ESR versions prior to 45.8 Thunderbird versions prior to 52 Thunderbird versions prior to 45.8

Description A use-after-free issue can occur when events are fired for a FontFace object after it has been destroyed, potentially leading to a crash.

Recommendations For Firefox versions prior to 52, update to version 52 or later. For Firefox ESR versions prior to 45.8, update to version 45.8 or later. For Thunderbird versions prior to 52, update to version 52 or later. For Thunderbird versions prior to 45.8, update to version 45.8 or later.